ARMY TM 9-2815-252-24 AIR FORCE TO 38G1-92-2 CHAPTER 3 MAINTENANCE SECTION I.  PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) 3-1.  PMCS PROCEDURES. 3-1.1.   General.    To  ensure  that  engine  is  ready  for  operation  at  all  times,  it  must  be  inspected  so  defects  can  be discovered  and  corrected  before  they  result  in  serious  damage  or  failure.    Perform  operator's  PMCS  prior  to  or  in conjunction with performance of engine PMCS.  For engine PMCS.  Refer to TABLE 3-1. TABLE 3-1.  Preventive Maintenance Checks and Services (PMCS) Interval Procedures Check Equipment is Item Item for and have Not Ready / No. M Q S A B H to be repaired or adjusted Available Inspected as necessary If 1 • 250 Oil Filter Refer to paragraph 3-20.1. 2 • 500 Fuel Filter Replace fuel filter element.  Refer to paragraph 3-16.1. 3 1000 Fuel Injectors Remove, inspect, and test.  Refer to paragraph 3-17. 4 1500 Engine Vacuum Check engine vacuum. Refer to paragraph 3-5. 5 • 1500 Engine Oil Check engine oil Pressure pressure.  Refer to paragraph 3-22. Change 3 3-1